holy s**t
http://www.imdb.com/title/tt3196216/fullcredits?ref_=tt_cl_sm#cast\\
thats the cast of the 8th episode when red john is revealed
OMG timothy carter is on the episode ( even if he is dead !! )
brett partridge also 
and ... michael kirkland !
but the biggest surprise
walter mashburn !!! and they put in his name : Walter Mashburn / Red John
Thats it , the show is over .. mashburn is red john
good luck